Blogs in Biology

I see blogs as a great way for students to show me what they know about a topic without the fear of a grade. I can foresee using them as a weekly journal. Each Friday students would spend some time recapping the week. What they liked, disliked and learned. I would set it up in a non-threatening way so that the students can provide feedback without fear of retribution. They can be a good way to monitor progress between tests.
The use of a blog will also reenforce the writing skills of an English class. I think that our entire school could use blogs in our writing across the curriculum exercises.